KR20070017710A - Liquid crystal display, panel therefor, and manufacturing method thereof - Google Patents

Abstract

The display panel for a liquid crystal display according to the present invention includes a substrate, an organic barrier formed on the substrate, and a color filter formed on the substrate and the barrier, wherein the partition has a particle size of 100 μs to 300 μs, The contact angle of the light blocking member upper surface with respect to water is 70 ° to 90 °, and the light blocking member upper surface roughness is 150 kPa to 200 kPa. The partition wall may serve as a light blocking member. By adjusting the particle size and the contact angle of the light blocking member and the roughness of the top surface of the light blocking member, it is possible to reduce the height difference of the color filter in the area defined as the light blocking member in manufacturing the color filter using the inkjet printing system.

Inkjet, color filter, light blocking member, roughness, planarization

Description

Liquid crystal display device, display panel for this and manufacturing method therefor {LIQUID CRYSTAL DISPLAY, PANEL THEREFOR, AND MANUFACTURING METHOD THEREOF}

1 is a layout view of a liquid crystal display according to an exemplary embodiment of the present invention.

2 is a layout view of a color filter panel of a liquid crystal display according to an exemplary embodiment of the present invention.

3 is a cross-sectional view of the liquid crystal display of FIG. 1 taken along line III-III.

4 is a cross-sectional view of the liquid crystal display of FIG. 1 taken along line IV-IV.

5A through 5D are cross-sectional views illustrating a manufacturing process of a color filter display panel for a liquid crystal display according to an exemplary embodiment of the present invention.

6 illustrates a light blocking member before and after plasma treatment according to an embodiment of the present invention.

7 illustrates that the color filter is formed by an inkjet printing method.

FIG. 8 is a table showing a change in contact angle as the leveling agent and the additive are mixed with the light blocking member material in an experimental example of the present invention. FIG.

FIG. 9 is a table illustrating a change in roughness of an upper surface of the light blocking member according to the size of pigment particles included in the light blocking member material in an experimental example of the present invention.

It is a graph which shows the result of having measured the light shielding member upper surface before and after a plasma processing with the atomic microscope.

11 is a table showing the surface roughness magnitudes of light blocking members before and after plasma treatment.

<Description of Drawing>

11, 21.Alignment film 12, 22.Polarizing plate

3.Liquid Crystal Layer 31 ... Liquid Crystal Molecule

33, 34 ... inclined member 81, 82 ... contact auxiliary member

83 Connection bridge 100 Thin film transistor display panel

110 ... substrate 121, 129 ... gate line

124 gate electrode 131 holding electrode wire

133a, 133b ... hold electrode 140 ... gate insulating film

151, 154 ... semiconductor 161, 163, 165 ... resistive contact layer

171, 179 Data line 173 Source electrode

175 Drain electrode 180 Shield

181, 182, 183a, 183b, 185 ... contact hole 191 ... pixel electrode

200 ... color filter panel 210 ... substrate

220 ... light-shielding member 230 ... color filter

250 ... overcoat 270 ... common electrode

The present invention relates to a display panel for a liquid crystal display device, a liquid crystal display device and a manufacturing method thereof.

In general, a liquid crystal display device includes a liquid crystal layer positioned between a field generating electrode and a pair of display panels provided with a polarizing plate. The field generating electrode generates an electric field in the liquid crystal layer and the arrangement of liquid crystal molecules changes as the intensity of the electric field changes. For example, the liquid crystal molecules of the liquid crystal layer in the state in which the electric field is applied to change the polarization of the light passing through the liquid crystal layer. The polarizer displays a desired image by appropriately blocking or transmitting polarized light to create bright and dark areas.

One display panel of the liquid crystal display is formed with three primary color filters, such as red, green, and blue. Using an inkjet printing system is one of methods for forming such a color filter. Forming a color filter using an inkjet printing system sprays a desired amount of three primary colors such as red, green, and blue through a plurality of nozzles of the inkjet head, thereby injecting the ink sprayed into the area surrounded by the light blocking member on the substrate. It is a way of filling and forming.

At this time, the height difference of the color filter exists in the area defined by the light blocking member due to the contact angle between the ink for the color filter, the side surfaces and the upper surface of the light blocking member, and the repulsive force against the liquid.

Therefore, the technical problem to be achieved by the present invention is to reduce the height difference of the color filter in the region defined by the light blocking member when manufacturing the color filter using the inkjet printing system.

The color filter display panel for a liquid crystal display device according to the present invention includes a substrate, an organic partition formed on the substrate, and a color filter formed on the substrate and the partition, wherein the particle size of the partition includes 100 μs to 300 μs. The contact angle of the partition wall with respect to water is 70 ° to 90 °, and the partition top surface roughness is 150 kPa to 200 kPa.

The partition wall may be a light blocking member.

The display panel for the liquid crystal display may further include an electric field generating electrode formed on the substrate.

The liquid crystal display according to the present invention includes a first substrate, a gate line and a data line formed on the first substrate, a thin film transistor connected to the gate line and the data line, a pixel electrode connected to the thin film transistor, A second substrate facing the first substrate, a light blocking member formed on the second substrate, a color filter formed on the second substrate and the light blocking member, and a common electrode formed on the color filter, The pigment particle size of the light blocking member is 100 kPa to 300 kPa, the contact angle of the light blocking member upper surface with water is 70 ° to 90 °, and the light shielding member upper surface roughness is 150 kPa to 200 kPa.

The light blocking member may include an organic material.

A method of manufacturing a color filter display panel for a liquid crystal display device according to the present invention comprises the steps of preparing a substrate, forming a light blocking member on the substrate, roughening the upper surface of the light blocking member, and using an inkjet printing system, And forming a color filter in a region defined by the light blocking member, and roughening the top surface of the light blocking member is to plasma-process the top surface of the light blocking member, and the pigment particle size of the light blocking member is 100 kV. To 300 mW.

The contact angle of the upper surface of the light blocking member may be 70 ° to 90 °.

The light blocking member upper surface roughness may be 150 kPa to 200 kPa.

DETAILED DESCRIPTION Embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Like parts are designated by like reference numerals throughout the specification. When a part of a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the other part being "right over" but also another part in the middle. On the contrary, when a part is "just above" another part, there is no other part in the middle.

A color filter display panel for a liquid crystal display according to an exemplary embodiment of the present invention and a liquid crystal display including the same will be described in detail with reference to FIGS. 1 to 4.

1 is a layout view of a liquid crystal display according to an exemplary embodiment of the present invention, FIG. 2 is a layout view of a display panel for a color filter according to an exemplary embodiment of the present invention, and FIGS. 3 and 4 are respectively a liquid crystal display of FIG. 1. Is a cross-sectional view taken along lines III-III and IV-IV.

The liquid crystal display according to the present exemplary embodiment includes a thin film transistor array panel 100 and a common electrode panel 200 facing each other, and a liquid crystal layer 3 interposed between the two display panels 100 and 200.

Next, a thin film transistor array panel for a liquid crystal display will be described in detail with reference to FIGS. 1, 3, and 4.

A plurality of gate lines 121 and a plurality of storage electrode lines 131 are formed on an insulating substrate 110 made of transparent glass or plastic.

The gate line 121 transmits a gate signal and mainly extends in a horizontal direction. Each gate line 121 includes a plurality of gate electrodes 124 protruding downward and an end portion 129 having a large area for connection with another layer or an external driving circuit. A gate driving circuit (not shown) for generating a gate signal may be mounted on a flexible printed circuit film (not shown) attached to the substrate 110 or directly mounted on the substrate 110, It may be integrated into the substrate 110. When the gate driving circuit is integrated on the substrate 110, the gate line 121 may extend to be directly connected to the gate driving circuit.

The storage electrode line 131 receives a predetermined voltage, and includes a stem line extending substantially in parallel with the gate line 121 and a plurality of pairs of first and second storage electrodes 133a and 133b separated therefrom. Each of the storage electrode lines 131 is positioned between two adjacent gate lines 121, and the stem line is closer to the lower side of the two gate lines 121. Each of the sustain electrodes 133a and 133b has a fixed end connected to the stem line and a free end opposite thereto. The fixed end of the first sustain electrode 133a has a large area, and its free end is divided into two parts, a straight portion and a bent portion. However, the shape and arrangement of the storage electrode line 131 may be modified in various ways.

The gate line 121 and the storage electrode line 131 may be formed of aluminum-based metal such as aluminum (Al) or aluminum alloy, silver-based metal such as silver (Ag) or silver alloy, copper-based metal such as copper (Cu) or copper alloy, or molybdenum ( It may be made of molybdenum-based metals such as Mo) or molybdenum alloy, chromium (Cr), tantalum (Ta) and titanium (Ti). However, they may have a multilayer structure including two conductive films (not shown) having different physical properties. One of the conductive films is made of a metal having low resistivity, such as aluminum-based metal, silver-based metal, or copper-based metal, so as to reduce signal delay or voltage drop. In contrast, other conductive films are made of other materials, particularly materials having excellent physical, chemical, and electrical contact properties with indium tin oxide (ITO) and indium zinc oxide (IZO), such as molybdenum-based metals, chromium, tantalum, and titanium. Good examples of such a combination include a chromium bottom film, an aluminum (alloy) top film, and an aluminum (alloy) bottom film and a molybdenum (alloy) top film. However, the gate line 121 and the storage electrode line 131 may be made of various other metals or conductors.

Side surfaces of the gate line 121 and the storage electrode line 131 are inclined with respect to the surface of the substrate 110, and the inclination angle is preferably about 30 ° to about 80 °.

A gate insulating layer 140 made of silicon nitride (SiNx) or silicon oxide (SiOx) is formed on the gate line 121 and the storage electrode line 131.

A plurality of linear semiconductors 151 made of hydrogenated amorphous silicon (hereinafter referred to as a-Si) or polysilicon are formed on the gate insulating layer 140. The linear semiconductor 151 mainly extends in the longitudinal direction and includes a plurality of projections 154 extending toward the gate electrode 124. The linear semiconductor 151 has a wider width in the vicinity of the gate line 121 and the storage electrode line 131 and covers them widely.

A plurality of linear and island ohmic contacts 161 and 165 are formed on the semiconductor 151. The ohmic contacts 161 and 165 may be made of a material such as n + hydrogenated amorphous silicon in which n-type impurities such as phosphorus are heavily doped, or may be made of silicide. The linear ohmic contact 161 has a plurality of protrusions 163, and the protrusion 163 and the island-type ohmic contact 165 are paired and disposed on the protrusion 154 of the semiconductor 151.

Side surfaces of the semiconductor 151 and the ohmic contacts 161 and 165 are also inclined with respect to the surface of the substrate 110, and the inclination angle is about 30 ° to 80 °.

A plurality of data lines 171 and a plurality of drain electrodes 175 are formed on the ohmic contacts 163 and 165 and the gate insulating layer 140.

The data line 171 transmits a data signal and mainly extends in the vertical direction to cross the gate line 121. Each data line 171 also crosses the storage electrode line 131 and runs between adjacent sets of storage electrodes 133a and 133b. Each data line 171 includes a plurality of source electrodes 173 extending toward the gate electrode 124 and an end portion 179 having a large area for connection with another layer or an external driving circuit. A data driving circuit (not shown) for generating a data signal is mounted on a flexible printed circuit film (not shown) attached to the substrate 110, directly mounted on the substrate 110, or integrated in the substrate 110. Can be. When the data driving circuit is integrated on the substrate 110, the data line 171 may be extended to be directly connected to the data driving circuit.

The drain electrode 175 is separated from the data line 171 and faces the source electrode 173 around the gate electrode 124. Each drain electrode 175 includes one wide end and the other end having a rod shape. The wide end portion overlaps the storage electrode line 131, and the rod-shaped end portion is partially surrounded by the bent source electrode 173.

One gate electrode 124, one source electrode 173, and one drain electrode 175 together with the protrusion 154 of the semiconductor 151 form one thin film transistor (TFT). A channel of the transistor is formed in the protrusion 154 between the source electrode 173 and the drain electrode 175.

The data line 171 and the drain electrode 175 are preferably made of a refractory metal such as molybdenum, chromium, tantalum and titanium, or an alloy thereof. The data line 171 and the drain electrode 175 may be formed of a refractory metal film (not shown) and a low resistance conductive material. It may have a multilayer structure including a film (not shown). Examples of the multilayer structure include a double layer of chromium or molybdenum (alloy) lower layer and an aluminum (alloy) upper layer, and a triple layer of molybdenum (alloy) lower layer and aluminum (alloy) interlayer and molybdenum (alloy) upper layer. However, the data line 171 and the drain electrode 175 may be made of various metals or conductors.

The side of the data line 171 and the drain electrode 175 may also be inclined at an inclination angle of about 30 ° to about 80 ° with respect to the surface of the substrate 110.

The ohmic contacts 161 and 165 exist only between the semiconductor 151 below and the data line 171 and the drain electrode 175 thereon, and lower the contact resistance therebetween. Although the linear semiconductor 151 is narrower than the data line 171 in most places, as described above, the width of the linear semiconductor 151 is widened at the portion where it meets the gate line 121 to smooth the profile of the surface, thereby disconnecting the data line 171. prevent. The semiconductor 151 has an exposed portion between the source electrode 173 and the drain electrode 175, and not covered by the data line 171 and the drain electrode 175.

A passivation layer 180 is formed on the data line 171, the drain electrode 175, and the exposed semiconductor 151. The passivation layer 180 may be made of an inorganic insulator or an organic insulator, and may have a flat surface. Examples of the inorganic insulator include silicon nitride and silicon oxide. The organic insulator may have photosensitivity and its dielectric constant is preferably about 4.0 or less. However, the passivation layer 180 may have a double layer structure of the lower inorganic layer and the upper organic layer so as not to damage the exposed portion of the semiconductor 151 while maintaining excellent insulating properties of the organic layer.

In the passivation layer 180, a plurality of contact holes 182 and 185 exposing the end portion 179 and the drain electrode 175 of the data line 171 are formed, respectively, and the passivation layer 180 and the gate insulating layer are formed. In the 140, a plurality of contact holes 181 exposing the end portion 129 of the gate line 121 and a plurality of contact holes 183a exposing a part of the storage electrode line 131 near the fixed end of the first storage electrode 133a. And a plurality of contact holes 183b exposing the protruding portion of the free end of the first storage electrode 133a.

A plurality of pixel electrodes 191, a plurality of overpasses 83, and a plurality of contact assistants 81 and 82 are formed on the passivation layer 180. They may be made of a transparent conductive material such as ITO or IZO or a reflective metal such as aluminum, silver, chromium or an alloy thereof.

The pixel electrode 191 is physically and electrically connected to the drain electrode 175 through the contact hole 185 and receives a data voltage from the drain electrode 175. The pixel electrode 191 to which the data voltage is applied is generated between the two electrodes 191 and 270 by generating an electric field together with the common electrode 270 of the other display panel 200 to which the common voltage is applied. The direction of liquid crystal molecules (not shown) of the liquid crystal layer 3 is determined. The polarization of light passing through the liquid crystal layer 3 varies according to the direction of the liquid crystal molecules determined as described above. The pixel electrode 191 and the common electrode 270 form a capacitor (hereinafter, referred to as a "liquid crystal capacitor") to maintain an applied voltage even after the thin film transistor is turned off.

The pixel electrode 191 overlaps the storage electrode line 131 including the storage electrodes 133a and 133b. A capacitor in which the pixel electrode 191 and the drain electrode 175 electrically connected thereto overlap the storage electrode line 131 is called a "storage capacitor", and the storage capacitor enhances the voltage holding capability of the liquid crystal capacitor. .

The contact auxiliary members 81 and 82 are connected to the end portion 129 of the gate line 121 and the end portion 179 of the data line 171 through the contact holes 181 and 182, respectively. The contact auxiliary members 81 and 82 compensate for and protect the adhesion between the end portion 129 of the gate line 121 and the end portion 179 of the data line 171 and the external device. The connecting leg 83 crosses the gate line 121 and exposes the exposed portion of the storage electrode line 131 and the storage electrode through contact holes 183a and 183b positioned on opposite sides with the gate line 121 interposed therebetween. 133b) is connected to the exposed end of the free end. The storage electrode lines 131 including the storage electrodes 133a and 133b may be used together with the connecting legs 83 to repair defects in the gate line 121, the data line 171, or the thin film transistor.

Next, the color filter display panel 200 will be described with reference to FIGS. 2 and 3.

A light blocking member 220 is formed on an insulating substrate 210 made of transparent glass, plastic, or the like. The light blocking member 220 is also called a black matrix and prevents light leakage.

The light blocking member 220 has a plurality of openings 225 facing the pixel electrode 191 and having substantially the same shape as the pixel electrode 191, and prevents light leakage between the pixel electrodes 191. However, the light blocking member 220 may include a portion corresponding to the gate line 121 and the data line 171 and a portion corresponding to the thin film transistor.

The light blocking member 220 serves as a partition wall confined to the opening 225 confining the color filter ink during the manufacturing process of the color filter display panel using the inkjet printing system.

The light blocking member 220 may be formed of an organic layer including a black pigment. The pigment particle size of the light blocking member 220 is 100 kPa to 300 kPa, the contact angle of the upper surface of the light blocking member 220 to water is 70 ° to 90 °, and the top surface roughness of the light blocking member 220 is 150 kPa to 200 kPa. Do. When the color filter 230 is formed using the inkjet printing system by the pigment particle size, the contact angle and the roughness of the upper surface of the light blocking member 220, The height difference of the color filter 230 in the center portion is reduced.

A plurality of color filters 230 is also formed on the substrate 210. The color filter 230 is mostly present in the region 225 surrounded by the light blocking member 230, and may extend in the vertical direction along the column of the pixel electrodes 191. Each color filter 230 may display one of primary colors such as three primary colors of red, green, and blue. The color filter 230 is preferably formed using an inkjet printing system.

An overcoat 250 is formed on the color filter 230 and the light blocking member 220. The overcoat 250 may be made of an (organic) insulator, which prevents the color filter 230 from being exposed and provides a flat surface. The overcoat 250 may be omitted.

The common electrode 270 is formed on the overcoat 250. The common electrode 270 is made of a transparent conductor such as ITO or IZO.

Alignment layers 11 and 21 are coated on inner surfaces of the display panels 100 and 200, and the alignment layers 11 and 21 may be horizontal alignment layers or vertical alignment layers. Polarizers 12 and 22 are provided on the outer surfaces of the display panels 100 and 200, and the polarization axes of the two polarizers 12 and 22 are orthogonal and one of the polarization axes is parallel to the gate line 121. desirable. In the case of a reflective liquid crystal display, one of the two polarizers 12 and 22 may be omitted.

The liquid crystal display according to the present exemplary embodiment may further include a phase retardation film (not shown) for compensating for the delay of the liquid crystal layer 3. The liquid crystal display may also include a polarizer 12 and 22, a phase retardation film, display panels 100 and 200, and a backlight unit (not shown) for supplying light to the liquid crystal layer 3.

Next, a color filter for a liquid crystal display and a method of manufacturing the same according to an embodiment of the present invention will be described in detail with reference to FIGS. 5A to 7.

5A through 5D are cross-sectional views illustrating a manufacturing process of a color filter display panel 200 for a liquid crystal display according to an exemplary embodiment of the present invention.

Referring to FIG. 5A, the light blocking member 220 is formed on the substrate 210. The light blocking member 220 may be formed of an organic layer including a black pigment. As described above, the particle size of the pigment included in the light blocking member 220 is 100 kPa to 300 kPa, and the contact angle of the upper surface of the light blocking member with respect to water may be 70 ° to 90 °. The contact angle of the light blocking member 220 may be adjusted by mixing a leveling agent or an additive with the main material of the light blocking member 220.

In FIG. 5B, the surfaces of the substrate 210 and the light blocking member 220 are plasma treated. The upper surface of the light blocking member 220 can be roughened by the plasma treatment.

6 (a) and 6 (b) show the light blocking member 220 before and after the plasma treatment, respectively, and as shown in FIG. 6, the roughness of the top surface of the light blocking member 220 increases after the plasma treatment. The roughness of the light blocking member 220 may also vary by adjusting the pigment particle size included in the light blocking member 220.

Referring to FIG. 5C, the color filter ink 5 is dropped from the nozzle of the head of the inkjet printing system 500 into the opening 225 defined by the plasma treated light blocking member 220, and then the printed color filter is used. The ink 5 is cured to dry the solvent of the ink 5 to form the color filter 230. The ink 5 is a pigment injection type ink in which a pigment showing color is dispersed in a solvent.

In FIG. 7, (a) shows a state immediately after dropping the ink 5, and (b) shows a state in which the color filter 230 is completed by removing the solvent of the ink 5.

As shown in FIG. 7, the amount of the ink 5 dripping from the nozzle of the inkjet head is larger than the capacity of the opening 225, so that the ink 5 may be present not only on the opening 225 but also on the light blocking member 220 immediately after printing. . In this case, since the light blocking member 220 has a contact angle of 70 ° or more with respect to water, the ink 5 in the liquid state and the repulsive force are so large that the ink 5 is drawn into the opening and the ink 5 is formed at the sidewall of the light blocking member 220. ) Height is low, and the height of the ink 5 is high at the central portion of the opening. Therefore, the height of the color filter 230 may be lowered at the sidewall of the opening 225 after the solvent of the ink 5 is removed. If the contact angle of the light blocking member 220 with respect to water is small and thus hydrophilic, the ink 5 existing on the light blocking member 220 has fluidity and is mixed with ink 5 of another color dropped in the adjacent opening. Can be.

However, as in the embodiment of the present invention, when the light blocking member 220 has a large contact angle with respect to water, and when the upper surface of the light blocking member 220 is plasma treated, the roughness of the top surface of the light blocking member 220 is increased, In addition to preventing mixing of the ink in the adjacent openings 225 on the upper surface, the frictional force increases in the upper surface of the light blocking member 220, thereby preventing the ink from fully penetrating into the openings 225. Therefore, the ink 5 may remain on a portion of the upper surface of the light blocking member 220, and the height of the ink 5 in the sidewall of the light blocking member 220 and the opening 225 may be the same. Therefore, as shown in FIG. 7B, the height of the color filter 230 in the opening 225 after removing the solvent of the ink 5 may be uniform.

Now, the contact angle, particle size and surface roughness of the light blocking member according to the experimental example of the present invention will be described.

FIG. 8 is a table measuring contact angles according to leveling agents and additives of a light blocking member according to an exemplary embodiment of the present invention, and FIG. 9 is a table measuring roughness differences of light blocking members according to particle sizes included in the light blocking member.

In this test example, "BK0910H-3" and "BK0350L-11" were used as the light blocking member. In BK0910H-3, 0.045% of a general leveling agent was mixed, and 0.075% of a leveling agent and 0.025% of an additive were added to BK0350L-11. Mixed. As shown in Fig. 8, the more the leveling agent and the additive were mixed, the larger the contact angle of the light blocking member was. It can be seen that the contact angle of the light blocking member can be adjusted by mixing the leveling agent and the additive with the material of the light blocking member. In addition, a contact angle greater than 70 ° can be obtained when 0.075% of the leveling agent and 0.025% of the additive are mixed.

In the experimental example illustrated in FIG. 9, "BK0910H-1" and "BK0350L-11" were used as light blocking members, and 0.075% leveling agent and 0.025% additive were mixed with BK0910H-1 and BK0350L-11, and BK0910H- 1 indicates that the average particle size was smaller than 100 microns, and BK0350L-11 was larger than 100 microns.

As shown in FIG. 9, in the case of BK0350L-11 having an average size of particles larger than 100 μs, the average roughness of the light blocking member 220 was greater than 165 μs, and in the case of BK0910H-1 having an average size of particles smaller than 100 μs, The average roughness of the light blocking member 220 was as small as 32 kW to 42 kW. The root mean square roughness was also very small when the average size of the particles was less than 100 mm 3. As such, when the average size of the particles included in the light blocking member 220 is greater than 100 mm 3, it can be seen that an average roughness larger than 165 mm 3 can be obtained.

Next, FIG. 10 is a graph showing the results of measuring the upper surface of the light blocking member 220 before and after plasma treatment by atomic force microscope, and FIG. 11 shows the surface roughness size of the light blocking member 220 before and after plasma treatment. Table to show.

As shown in FIG. 10, after the plasma treatment of the upper surface of the light blocking member 220, the curvature of the surface of the light blocking member 220 became larger. Referring to FIG. 11, the average roughness and the squared average roughness sizes increased after the plasma treatment. That is, it can be seen that the difference between high and low on the upper surface of the light blocking member 220 is increased by the plasma treatment.

The liquid crystal display according to the present invention adjusts the particle size and the contact angle of the light blocking member and the roughness of the top surface of the light blocking member, thereby producing a height difference of the color filter in the opening defined by the light blocking member when manufacturing the color filter using the inkjet printing system. Can be reduced.

Although the preferred embodiments of the present invention have been described in detail above, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention.

Claims (8)

Board, An organic barrier formed on the substrate, and A color filter formed on the substrate and the partition wall Including; The partition includes a particle size of 100 Å to 300 Å, The contact angle of the partition wall with respect to water is 70 ° to 90 °, and the partition top surface roughness is 150 격 to 200Å. Display panel for liquid crystal display device. In claim 1, The partition wall is a display panel for a liquid crystal display device that is a light blocking member. In claim 1, And a field generating electrode formed on the substrate. First substrate, A gate line and a data line formed on the first substrate; A thin film transistor connected to the gate line and the data line, A pixel electrode connected to the thin film transistor, A second substrate facing the first substrate, A light blocking member formed on the second substrate, A color filter formed on the second substrate and the light blocking member; and Common electrode formed on the color filter Including; The particle size of the light-shielding member includes a pigment is 100 kPa to 300 kPa, The contact angle of the upper surface of the light blocking member with respect to water is 70 ° to 90 °, the roughness of the upper surface of the light blocking member is 150 kPa to 200 kPa Liquid crystal display. In claim 4, The light blocking member includes an organic material. Preparing the substrate, Forming a light blocking member on the substrate; Roughening an upper surface of the light blocking member, and Using an inkjet printing system, forming a color filter in a region defined by the light blocking member Including; The roughening of the upper surface of the light blocking member is performed by plasma treatment of the upper surface of the light blocking member, and the particle size of the light blocking member is 100 μs to 300 μs. Display panel manufacturing method for liquid crystal display devices. In claim 6, The contact angle of the upper surface of the light blocking member is 70 ° to 90 ° display panel manufacturing method for a liquid crystal display device. In claim 6, The light blocking member upper surface roughness is 150 kPa to 200 kPa, the display panel manufacturing method for a liquid crystal display device.

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